HomeMy WebLinkAboutSUB200800065 Review Comments Groundwater Assessment 2008-02-29Tier II Groundwater Assessment
TMP 79 -10
Application Number: SUB200800065 - Church of the Nazarene
Groundwater Reviewer: J. Rubinstein
Date: 29 February 2008
Description: 2 divisions — 3 lots
Water Quantity
The Albemarle County Database shows seventeen wells within half a mile of
the lot. The wells range from 96 to 405 feet in depth with a median depth of
242 feet. The well yields range from zero to forty gallons per minute with a
median yield of seven gallons per minute.
Water Quality
As shown on the Virginia Department of Environmental Quality (DEQ) GIS
websitel, there is 12 leaking underground storage tank sites (LUST) within a
mile of the parcel. The DEQ considers all these cases closed
Buffers
According to the county GIS site, stream buffers are required on tax map 79-
10 along the tributaries to the Barn Branch and the Camp Branch of the
Rivanna River.2 On 6 February 2008, the Board of Supervisors extended the
required buffers to include intermittent streams. The revision of the Water
Protection Ordinance requires a buffer along the western boundary of parcel
A.
The parcel is in the Middle Rivanna River watershed which does not serve a
public water supply.
1 http: // gisweb. deq .virginia.gov /deqims /viewer.htm ?SERVICE= VA_DEQ
2 http: / /gisweb.albemarle.org/
Site Description
According to the Virginia Department of Mineral Resources 1993 Map, the
bedrock beneath the parcel is in the metabasalt of the Catoctin Formation
(CZc, CZcb).
In a groundwater assessment done for the Albemarle County, ENSAT
Corporation divided the county into `hydrologic units'. Below is ENSAT's
description of the unit which contains the parcel:
The Blue Ridge East unit overlies "greenstone" and represents the eastern
limb of the Blue Ridge Anticlinorium. The area is characterized by the
presence of a prominent ridge which rises and trends generally northeast
within the otherwise rolling piedmont landscape. Portions of this ridge
are known locally as Green Mountain, Carters Mountain and the
Southwest Mountains. This area is dominated by the Rabun and
Myersville soils and to a lesser extent, the Catoctin. The Rabun soil
series is deep and well drained and like the Myersville soil series is
formed from weathered greenstone. The Catoctin soil series is
considered to be moderately deep and well drained and is also formed